Sunday, August 10, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, AUGUST 10, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0446E
SUNSET: 1852E
PLENTY OF SUNSHINE, BUT WARMER AND MORE HUMID TODAY….
Despite high thin cirrus clouds passing overhead today, there
has been an abundance of sunshine, which has become a common
theme of late. While all the dry sunny weather is great for
outdoor activity, especially this time of year, the lack of
rainfall isn’t a good thing in terms of soil moisture. For the
month our rainfall deficit is around 0.75″, however for the
year it’s up to 2″. With plenty of heat expected this week,
the soil will continue to dry further, and we’ll likely start
seeing drought conditions increasing across the area.
Temperatures are pushing above normal levels today with readings
getting into the upper 80s early this afternoon. The dew point
has been increasing as well making for a more humid feel today
as compared to the past few days. Values have risen from the
low 60s to the mid 60s so far today.
The wind has yet again been on the light side today, with a
general flow out of the southwest and west-southwest. The
average speed for the day so far is around 8mph. The peak gust
so far for the day is just 16mph, which occurred just after
2am this morning.
Visibility has been around 30 miles throughout the day thanks
to hazy conditions.
The maximum temperature so far today is 88F degrees, which is
7 degrees above the normal high of 81F. The minimum temperature
since midnight is 61F degrees, which is 2 degrees below the
normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Thin broken cirrus, few stratocumulus distant ESE-SSW
Temperature: 67F; Dew Point: 62F; Relative Humidity: 85%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1024.7 mb; 30.26 in. Hg: rising, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 67F
6-hr Min temp: 61F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 -BKN 30 247/67/62/2306/026/ FEW SC DSNT ESE-SSW
HAZY WND LGT/ 8/501 51012 10067 20061
10 A.M.
Weather: Thin broken cirrus
Temperature: 78F; Dew Point: 65F Relative Humidity: 64%
Wind: SW @ 3 kts, wind light
Sea-level pressure: 1024.9 mb; 30.27 in. Hg: rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E250 -BKN 30 249/78/65/2203/027/ HAZY WND LGT/
8/001 50002
1 P.M.
Weather: Thin broken cirrus, few cumulus all quadrants
Temperature: 87F Dew Point: 66F; Relative Humidity: 50%
Wind: W @ 4 kts, wind light and variable
Sea-level pressure: 1023.7 mb; 30.23 in. Hg: falling steadily
Visibility: 30 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 67F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 -BKN 30 237/97/66/2804/023/ FEW CU ALQDS HAZY
WND L/V/ 8/201 57012 10087 20067
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SUMMARY FOR SATURDAY, AUGUST 9, 2025
TEMPERATURE (DEGREES F)
MAX…….83 NORMAL…..81
MIN…….60 NORMAL…..64
MEAN……72 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………..0
TOTAL DEPARTURE FOR THE MONTH………………………-30 [-3.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………..0 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………….1 DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE………..2 DEPARTURE……..-1
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..7 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….42 DEPARTURE…….-28
TOTAL COOLING UNITS FOR THE SEASON…………..553 DEPARTURE…….+96
TOTAL COOLING UNITS LAST SEASON TO DATE………587 DEPARTURE…….-34
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)………..22 S @ 09:05 P.M.
VECTOR #1 (1-Sec)……….22 SSW @ 08:59 P.M.
VECTOR #2 (1-Sec)……….22 S @ 08:57 P.M.
DAVIS #1……………….23 S @ 08:59 P.M.
DAVIS #2 ………………26 S @ 09:02 P.M.
RMY #1 (Instantaneous)…..22 SSW @ 08:59 P.M.
RMY #2 (Instantaneous)…..23 S @ 08:57 P.M.
MERLIN…………………20 S
RICHARDS (C5C) (Inst)……21 SSW @ 08:59 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 S @ 09:15 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 08:59 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 08:58 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 S @ 08:59 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S @ 09:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SSW @ 08:59 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 SSW @ 08:58 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 SSW @ 08:59 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.2 SSW [173 total miles]
VECTOR #1……………….7.8
VECTOR #2……………….8.0
DAVIS #1………………..7.4 S
DAVIS #2………………..7.7 S
RMY #1………………….7.6 S
RMY #2………………….8.1 S
RICHARDS (C5C)…………..7.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..-0.75
TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-2.00
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PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
8/1 71/57/64/-9/0.44/546/63 28 NE VEC1 28 NE RMY 27
8/2 75/54/65/-8/0.00/838/97 18 NNW VEC1 18 NNW RMY 18
8/3 83/59/71/-2/0.00/784/91 21 SSW VEC1 21 SSW RMY 21
8/4 84/61/73/0/0.00/757/88 17 W VEC1 17 W RMY 17
8/5 73/62/68/-5/0.00/480/56 28 NE VEC1 27 NE RMY 28
8/6 77/61/69/-4/0.00/248/29 17 ENE VEC1 17 ENE RMY 16
8/7 81/61/71/-2/0.00/…/.. 18 ESE VEC1 18 ESE RMY 17
8/8 83/61/72/0/0.00/…/.. 21 SSW VEC1 21 SSW RMY 21
8/9 83/60/72/0/0.00/…/.. 22 S VEC1 22 SSW RMY 22
8/10 The low since midnight is 61F, the daily normal low is 63F.
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AUGUST DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975]
LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976
RECORDS FOR AUGUST 11
HIGH 97F IN 1944
LOW 49F IN 1972
PRECIP 3.13 INCHES IN 1990
PEAK GUST 44 MPH SW IN 1971
TODAY’S REPORT PREPARED BY: MFD
